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Natural selection contributes to geographic patterns of thermal plasticity in Plantago lanceolata

A long‐standing debate in evolutionary biology concerns the relative importance of different evolutionary forces in explaining phenotypic diversification at large geographic scales. For example, natural selection is typically assumed to underlie divergence along environmental gradients. However, neu...

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Autores principales: Marshall, Matthew M., Batten, Leslie C., Remington, David L., Lacey, Elizabeth P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6405498/
https://www.ncbi.nlm.nih.gov/pubmed/30891228
http://dx.doi.org/10.1002/ece3.4977
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author Marshall, Matthew M.
Batten, Leslie C.
Remington, David L.
Lacey, Elizabeth P.
author_facet Marshall, Matthew M.
Batten, Leslie C.
Remington, David L.
Lacey, Elizabeth P.
author_sort Marshall, Matthew M.
collection PubMed
description A long‐standing debate in evolutionary biology concerns the relative importance of different evolutionary forces in explaining phenotypic diversification at large geographic scales. For example, natural selection is typically assumed to underlie divergence along environmental gradients. However, neutral evolutionary processes can produce similar patterns. We collected molecular genetic data from 14 European populations of Plantago lanceolata to test the contributions of natural selection versus neutral evolution to population divergence in temperature‐sensitive phenotypic plasticity of floral reflectance. In P. lanceolata, reflectance plasticity is positively correlated with latitude/altitude. We used population pairwise comparisons between neutral genetic differentiation (F (ST) and Jost's D) and phenotypic differentiation (P (ST)) to assess the contributions of geographic distance and environmental parameters of the reproductive season in driving population divergence. Data are consistent with selection having shaped large‐scale geographic patterns in thermal plasticity. The aggregate pattern of P (ST) versus F (ST) was consistent with divergent selection. F (ST) explained thermal plasticity differences only when geographic distance was not included in the model. Differences in the extent of cool reproductive season temperatures, and not overall temperature variation, explained plasticity differences independent of distance. Results are consistent with the hypothesis that thermal plasticity is adaptive where growing seasons are shorter and cooler, that is, at high latitude/altitude.
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spelling pubmed-64054982019-03-19 Natural selection contributes to geographic patterns of thermal plasticity in Plantago lanceolata Marshall, Matthew M. Batten, Leslie C. Remington, David L. Lacey, Elizabeth P. Ecol Evol Original Research A long‐standing debate in evolutionary biology concerns the relative importance of different evolutionary forces in explaining phenotypic diversification at large geographic scales. For example, natural selection is typically assumed to underlie divergence along environmental gradients. However, neutral evolutionary processes can produce similar patterns. We collected molecular genetic data from 14 European populations of Plantago lanceolata to test the contributions of natural selection versus neutral evolution to population divergence in temperature‐sensitive phenotypic plasticity of floral reflectance. In P. lanceolata, reflectance plasticity is positively correlated with latitude/altitude. We used population pairwise comparisons between neutral genetic differentiation (F (ST) and Jost's D) and phenotypic differentiation (P (ST)) to assess the contributions of geographic distance and environmental parameters of the reproductive season in driving population divergence. Data are consistent with selection having shaped large‐scale geographic patterns in thermal plasticity. The aggregate pattern of P (ST) versus F (ST) was consistent with divergent selection. F (ST) explained thermal plasticity differences only when geographic distance was not included in the model. Differences in the extent of cool reproductive season temperatures, and not overall temperature variation, explained plasticity differences independent of distance. Results are consistent with the hypothesis that thermal plasticity is adaptive where growing seasons are shorter and cooler, that is, at high latitude/altitude. John Wiley and Sons Inc. 2019-02-14 /pmc/articles/PMC6405498/ /pubmed/30891228 http://dx.doi.org/10.1002/ece3.4977 Text en © 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Marshall, Matthew M.
Batten, Leslie C.
Remington, David L.
Lacey, Elizabeth P.
Natural selection contributes to geographic patterns of thermal plasticity in Plantago lanceolata
title Natural selection contributes to geographic patterns of thermal plasticity in Plantago lanceolata
title_full Natural selection contributes to geographic patterns of thermal plasticity in Plantago lanceolata
title_fullStr Natural selection contributes to geographic patterns of thermal plasticity in Plantago lanceolata
title_full_unstemmed Natural selection contributes to geographic patterns of thermal plasticity in Plantago lanceolata
title_short Natural selection contributes to geographic patterns of thermal plasticity in Plantago lanceolata
title_sort natural selection contributes to geographic patterns of thermal plasticity in plantago lanceolata
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6405498/
https://www.ncbi.nlm.nih.gov/pubmed/30891228
http://dx.doi.org/10.1002/ece3.4977
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